Product Description
Unlock substantially more sound from the GT3-derived 4.0-liter flat-six with the SOUL Performance Products Competition Over Axle Pipes for the Porsche 718 Cayman GT4 RS and 718 Spyder RS.
The factory over-axle assemblies contain secondary catalytic elements as well as particulate-filter chambers that are empty on North American-market cars. SOUL removes these restrictions and replaces the factory assemblies with a free-flowing design engineered to maintain a full 3-inch exhaust path from flange to flange.
Packaging around the rear suspension and bodywork is extremely tight on the 718 RS platform. Rather than reducing tubing diameter through these areas, SOUL utilizes specially formed oval tubing to preserve cross-sectional flow area while maintaining the necessary chassis clearance.
The result is a dramatically more direct exhaust path, substantially increased exhaust volume, and a significant reduction in weight. The SOUL Competition Over Axle Pipes weigh approximately 11.65 lbs compared with approximately 25 lbs for the factory assemblies, saving roughly 13.3 lbs from the rear of the vehicle.
For owners looking for one of the most significant single-component sound upgrades available for the GT4 RS or Spyder RS, the Competition Over Axle Pipes deliver increased volume and character while retaining compatibility with the factory headers and rear exhaust.
Fitment
Fits:
Compatible with factory or upgraded headers.
Compatible with factory or upgraded rear exhaust systems.
Details
Full 3-inch exhaust flow path from flange to flange
Removes the factory secondary catalytic elements
Removes the factory particulate-filter chambers
Specially formed oval tubing maintains exhaust flow through tight suspension and body clearances
SOUL system weight: approximately 11.65 lbs
Factory over-axle pipe weight: approximately 25 lbs
Weight savings: approximately 13.3 lbs / 6 kg
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Precision water-jet-cut flanges
Flanges manufactured to ISO 9001:2015 standards
Flange tolerances of approximately ±0.003 inch
Fixture-built to maintain dimensional accuracy during welding
Quality checked and fixture tested before shipment
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
No check engine light expected on North American-market vehicles
ECU tuning required for European-market vehicles
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
Heat Management
The GT3-derived 4.0-liter engine used in the GT4 RS and Spyder RS produces considerable exhaust heat, particularly in the tightly packaged over-axle area.
Although the simplified Competition Over Axle Pipe design removes much of the heat-soaking mass found in the factory assemblies, SOUL strongly recommends the use of a thermal-management solution to help protect nearby components and bodywork.
The Competition Over Axle Pipes are available with or without SOUL's optional heat solution.
Factory vs. SOUL Competition Over Axle Pipes
Factory Over Axle Pipes
Approximately 25 lbs
Secondary catalytic elements remain in the exhaust path
Factory particulate-filter chambers remain in place
Factory exhaust routing and construction
SOUL Competition Over Axle Pipes
Approximately 11.65 lbs
Approximately 13.3 lbs / 6 kg lighter than factory
Secondary catalytic elements removed
Particulate-filter chambers removed
Full 3-inch exhaust path from flange to flange
T304L stainless-steel construction
Significantly increased exhaust sound
Optional thermal-management solution
Product Description
Unlock substantially more sound from the GT3-derived 4.0-liter flat-six with the SOUL Performance Products Competition Over Axle Pipes for the Porsche 718 Cayman GT4 RS and 718 Spyder RS.
The factory over-axle assemblies contain secondary catalytic elements as well as particulate-filter chambers that are empty on North American-market cars. SOUL removes these restrictions and replaces the factory assemblies with a free-flowing design engineered to maintain a full 3-inch exhaust path from flange to flange.
Packaging around the rear suspension and bodywork is extremely tight on the 718 RS platform. Rather than reducing tubing diameter through these areas, SOUL utilizes specially formed oval tubing to preserve cross-sectional flow area while maintaining the necessary chassis clearance.
The result is a dramatically more direct exhaust path, substantially increased exhaust volume, and a significant reduction in weight. The SOUL Competition Over Axle Pipes weigh approximately 11.65 lbs compared with approximately 25 lbs for the factory assemblies, saving roughly 13.3 lbs from the rear of the vehicle.
For owners looking for one of the most significant single-component sound upgrades available for the GT4 RS or Spyder RS, the Competition Over Axle Pipes deliver increased volume and character while retaining compatibility with the factory headers and rear exhaust.
Fitment
Fits:
Compatible with factory or upgraded headers.
Compatible with factory or upgraded rear exhaust systems.
Details
Full 3-inch exhaust flow path from flange to flange
Removes the factory secondary catalytic elements
Removes the factory particulate-filter chambers
Specially formed oval tubing maintains exhaust flow through tight suspension and body clearances
SOUL system weight: approximately 11.65 lbs
Factory over-axle pipe weight: approximately 25 lbs
Weight savings: approximately 13.3 lbs / 6 kg
Constructed from thick-wall 0.065-inch T304L stainless steel
Mandrel-bent tubing
Back-purged TIG-welded construction
Precision water-jet-cut flanges
Flanges manufactured to ISO 9001:2015 standards
Flange tolerances of approximately ±0.003 inch
Fixture-built to maintain dimensional accuracy during welding
Quality checked and fixture tested before shipment
New high-grade installation hardware included
Designed and built in-house in Willow Grove, Pennsylvania
No check engine light expected on North American-market vehicles
ECU tuning required for European-market vehicles
Backed by SOUL Performance Products' Lifetime Warranty for street and track use
Heat Management
The GT3-derived 4.0-liter engine used in the GT4 RS and Spyder RS produces considerable exhaust heat, particularly in the tightly packaged over-axle area.
Although the simplified Competition Over Axle Pipe design removes much of the heat-soaking mass found in the factory assemblies, SOUL strongly recommends the use of a thermal-management solution to help protect nearby components and bodywork.
The Competition Over Axle Pipes are available with or without SOUL's optional heat solution.
Factory vs. SOUL Competition Over Axle Pipes
Factory Over Axle Pipes
Approximately 25 lbs
Secondary catalytic elements remain in the exhaust path
Factory particulate-filter chambers remain in place
Factory exhaust routing and construction
SOUL Competition Over Axle Pipes
Approximately 11.65 lbs
Approximately 13.3 lbs / 6 kg lighter than factory
Secondary catalytic elements removed
Particulate-filter chambers removed
Full 3-inch exhaust path from flange to flange
T304L stainless-steel construction
Significantly increased exhaust sound
Optional thermal-management solution
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